Media Center doesn't like high-res displays

My primary display is a 30" 2560x1600 LCD. When I start up Media Center for the first time it pops up a dialog telling me that my display is running at too high a resolution, which may affect Media Center performance, and that I should close Media Center and reduce the resolution.

I ignored the message...so far things seem to be working ok. FWIW, when I use the Performance applet in Control Panel it tells me that graphics performance has a rating of 5.2

its fine then... I think its just warning you because movies are only up to 1080p (1920x1080), so it would be a little enlarged.

It also may be a warning just incase you have a low performance computer.

Don't worry about it, its just letting you know